Well I never knew it was possible because I tried, I wish I knew sooner but SVN is a lot better than dropbox. Svn is able to store your files, keep a revision log, and view changes of your project by going into the files, and you can view what you had before, and after. It is a great way to keep bug fixes, also it works similar as dropbox allowing people on your team to download the files that you want. But I recommend this a lot more then dropbox, if I knew it was possible my game would have been less buggy. But here is the link I am not trying to promote any sites or anything but they deserve the credits, I think mods should post it here.
http://www.hbgames.org/forums/viewtopic.php?t=63438
http://www.hbgames.org/forums/viewtopic.php?t=63438